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63題: 下列 IEEE 802.11 系列標(biāo)準(zhǔn)中,支持 2.4GHz 和 5GHz 兩個(gè)工作頻段的是()。
A.802.11a
B.802.11ac
C.802.11b
D.802.11g
答案解析與討論:
m.xiexiliangjiufa.com/st/5208718405.html第
64題: 某無線路由器,在 2.4GH 頻道上配置了 2 個(gè)信道,使用()信道間干擾最小。
A.1 和 3
B.4 和 7
C.6 和 10
D.7 和 12
答案解析與討論:
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65題: 以下關(guān)于層次化網(wǎng)絡(luò)設(shè)計(jì)模型的描述中,不正確的是()。
A.終端用戶網(wǎng)關(guān)通常部署在核心層,實(shí)現(xiàn)不同區(qū)域間的數(shù)據(jù)高速轉(zhuǎn)發(fā)
B.流量負(fù)載和 VLAN 間路由在匯聚層實(shí)現(xiàn)
C.MAC 地址過濾、路由發(fā)現(xiàn)在接入層實(shí)現(xiàn)
D.接入層連接無線 AP 等終端設(shè)備
答案解析與討論:
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67題: 《中華人民共和國數(shù)據(jù)安全法》由中華人民共和國第十三屆全國人民代表大會(huì)常務(wù)委員會(huì)第二十九次會(huì)議審議通過,自()年 9 月 1 日起施行。
A.2019
B.2020
C.2021
D.2022
答案解析與討論:
m.xiexiliangjiufa.com/st/5209114717.html第
68題: 以下關(guān)于信息化項(xiàng)目成本估算的描述中,不正確的是()。
A.項(xiàng)目成本估算指設(shè)備采購、勞務(wù)支出等直接用于項(xiàng)目建設(shè)的經(jīng)費(fèi)估算
B.項(xiàng)目成本估算需考慮項(xiàng)目工期要求的影響,工期要求越短成本越高
C.項(xiàng)目成本估算需考慮項(xiàng)目質(zhì)量要求的影響,質(zhì)量要求越高成本越高
D.項(xiàng)目成本估算過粗或過細(xì)都會(huì)影響項(xiàng)目成本
答案解析與討論:
m.xiexiliangjiufa.com/st/5209217071.html第
69題: A network attack is an attempt to gain(71)access to an organization’s network,with the objective of stealing data or performing other malicious activities.Plagiarism is A(72)-of-service(DoS)attack is a cyber-attack in which the attacker seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network.In the case of a simple attack,a(73)could have a simple rule added to deny all incoming traffic from the attackers,based on protocols,ports,or the originating IP addresses.In a(74)DoS(DDoS)attack wangwangwang,the incoming traffic flooding the victim originates from(75)different sources.This effectively makes it impossible to stop the attack simply by blocking a single source
A.unauthorized
B.a(chǎn)uthorized
C.normal
D.frequent
A.defense
B.denial
C.detection
D.decision
A.firewall
B.router
C.gateway
D.switch
A.damaged
B.descriptive
C.distributed
D.demanding
A.two
B.many
C.much
D.ten
答案解析與討論:
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